How to get office theme in Office js

OfficeTheme is only supported in Office on Windows, Mac, and the web.

// Get office theme colors. 
const bodyBackgroundColor = Office.context.officeTheme.bodyBackgroundColor;
            const bodyForegroundColor = Office.context.officeTheme.bodyForegroundColor;
            const controlBackgroundColor = Office.context.officeTheme.controlBackgroundColor;
            const controlForegroundColor = Office.context.officeTheme.controlForegroundColor;

            console.log({
                bodyBackgroundColor,
                bodyForegroundColor,
                controlBackgroundColor,
                controlForegroundColor,
            });